Exodus 7:11-13

King James Version

¹¹ Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments.

¹² For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods.

¹³ And he hardened Pharaoh's heart, that he hearkened not unto them; as the Lord had said.